Authors
R. Nikolova
Department of Occupational Medicine, Faculty of Public Health, Medical University – Sofia, Bulgaria
S. Danev
Medeia Group Ltd. Company – Sofia, Bulgaria
T. Kundurjiev
Department of Occupational Medicine, Faculty of Public Health, Medical University – Sofia, Bulgaria
N. Madjarov
Department of Occupational Medicine, Faculty of Public Health, Medical University – Sofia, Bulgaria
